#include<stdio.h>

int to_num(char *p);	
int op(char *p1, char *p0, char *p2, int *f);
int main(int argc, char *argv[]){
	if(2 == argc){
		char *p = argv[1];
		int num = 0;
		num = to_num(p);
		if(num != -1){
			printf("%d\n", num);
		}else{	
			printf("少管我！\n");
		}
	}else if(4 == argc){
		int flag = 1;
		int ans = op(argv[1], argv[2],argv[3], &flag);
		if(flag){
			printf("%d\n", ans);
		}else{
			printf("少管我！\n");
		}


	}
	return 0;
}


int to_num(char *p){	
	int num = 0;
	for(int i = 0; *(p + i); i++){
		if(*(p + i) < '0' || *(p + i) > '9')
			return -1;
		num = (num * 10) + (int)(*(p + i) - '0');
	}
	return num;
}

int op(char *p1, char *p0, char *p2, int *f){
	int num1 = to_num(p1);
	int num2 = to_num(p2);
	int ans = 0;
	switch(*p0){
		case '+':
			ans = num1 + num2;
			break;
		case '-':
			ans = num1 - num2;
			break;
		case 'x':
			ans = num1 * num2;
			break;
		case '/':
			if(0 == num2){
				*f = 0;
			}else{
				ans = num1 / num2;
			}
			break;
		default:
			*f = 0;
			break;
	}
	return ans;
}
